Author Topic: Where is this oil coming from? (Read 2761 times)

///M3Mike · « **on:** November 02, 2009, 08:38:10 PM »

Bad pic, sorry. I have some oil accumulating in a small indentation in the block just behind/under the oil pressure sensor on the filter housing.

Is it most likely the housing gasket or O-ring (#8 or 9 below) or something more serious?

quinn11m20 · « **Reply #1 on:** November 02, 2009, 08:42:15 PM »

Mine did the same thing to until I changed the pressure sending unit seal with a copper crush seal. It don't leak anymore

///M3Mike · « **Reply #2 on:** November 02, 2009, 09:06:37 PM »

Did you get a whole new pressure sending unit or just the seal? Can you get the seal separately?

Thanks!!

quinn11m20 · « **Reply #3 on:** November 02, 2009, 09:08:32 PM »

I just got the crush washer from my German parts guy locally.

1991 E30 M42 · « **Reply #4 on:** November 02, 2009, 10:37:34 PM »

the oil is more than likely coming through the connector end of the sensor, you need to replace the sensor itself

///M3Mike · « **Reply #5 on:** November 03, 2009, 07:47:19 AM »

Dumb question.....since the filter housing is so high up on the engine, does the oil need to be drained to replace those?

I just changed my oil a couple weeks ago and I hate to throw away perfectly good oil

monty23psk · « **Reply #6 on:** November 03, 2009, 08:44:36 AM »

If you let the car sit overnight, most of the oil will be in the pan. You will still loose some oil but should be less than a quart.

///M3Mike · « **Reply #7 on:** November 04, 2009, 06:21:16 PM »

Well, got everything buttoned back up. Turns out there wasn't even an O-ring above the gasket (#8 in the realoem pic) and there also isn't an o-ring between the block and the dipstick tube. Hopefully replacing those will take care of all my oil leak issues.

Author Topic: Where is this oil coming from? (Read 2761 times)

///M3Mike

///M3Mike

///M3Mike

///M3Mike